|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||A-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Golconda Creek is a north tributary to the North Fork of the Bremner River. Placer gold has been recovered at least locally on Golconda Creek for two miles downstream from an elevation of about 3,500 feet to an elevation of about 2,900 feet. The coordinates are at the confluence of Golconda and Standard Creeks in the NE1/4 of section 16, T. 10 S., R. 11 E. of the Copper River Meridian. This is locality 8 of MacKevett (1976); it is accurately located. Cobb and MacKevett (1980) included this mine under the name 'Golconda Cr.'.|
Geologic descriptionPlacer gold has been recovered at least locally on Golconda Creek for two miles. (MacKevett, 1976). Gold was discovered in 1901 and small-scale surface mining including hydraulic operations, recovered a few thousand ounces of gold during the next 10 to 15 years (Cobb and MacKevett, 1980). The gold was rough and partly attached to quartz; gold nuggets up to about 2.5 ounces in size were recovered (Moffit, 1912; Moffit 1914). The gold was in gravels up to 8 feet thick. Golconda Creek reworks bench deposits of gold-bearing glaciofluvial gravels. Bedrock in the area is metaflysch of the Cretaceous Valdez Group that is locally intruded by felsic dikes (MacKevett (1978). Slate bedrock was common in the mining operations.
|Geologic map unit||(-143.457535627948, 61.0064419661492)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Gold was discovered in 1901 and small-scale surface mining, including hydraulic operations, recovered a few thousand ounces during the next 10 to 15 years (Cobb and MacKevett, 1980).|
|Indication of production||Yes; small|
|Production notes||A total of 2,000 to 3,000 ounces of gold are estimated to have been produced from Golconda Creek (Cobb and MacKevett, 1980).|
Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve.
Cobb, E.H., and MacKevett, E.M., Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the McCarthy quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-885, 156 p.
MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, 2 sheets, scale 1:250,000.
MacKevett, E.M., Jr., 1978, Geologic map of the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1032, 1 sheet, scale l:250,000.
Moffit, F.H., 1912, The Taral and Bremner River districts: U.S. Geological Survey Bulletin 520, p. 93-104.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|